Which of the following is a disadvantage of acceleration sprints?

Muscle fatigue from lactic acid buildup is indeed a known disadvantage of acceleration sprints. During high-intensity sprints, such as those performed in acceleration training, the body relies on anaerobic energy systems. As these systems work to fuel the muscles quickly, they produce lactic acid as a byproduct. When lactic acid accumulates, it can lead to discomfort, a burning sensation in the muscles, and a decrease in performance due to fatigue. This fatigue can impair the ability to maintain sprinting speed over repeated efforts, making recovery more difficult and potentially limiting the effectiveness of the training session.

In contrast, the requirement for extensive training indicates a need for preparation rather than a disadvantage, as most physical activities benefit from proper training regimes. The notion that acceleration sprints are always fun and engaging does not present a disadvantage; rather, it suggests a positive aspect of such activities. Lastly, the effectiveness of acceleration sprints for improving speed is well established in athletic training, as they are designed specifically to enhance acceleration and overall speed performance.